INTERFACE:
MODULE eqstateDESCRIPTION:
Computes the density, , and buoyancy from the salinity, , the temperature, , and the thermodynamic pressure, , according to an equation of state,
The following remark on the thermodynamic interpretation of density, temperature, and pressure is useful here. If is identified with the in-situ temperature, and with the in-situ pressure, then will be the in-situ density. On the other hand, if is identified with the surface pressure, and with the potential temperature, the same equation of state, (244), will yield as the potential density. Note that the quantity sigma_t found in the GOTM output is simply computed from - 1000 kg m, and may therefore adopt different meanings.
At present, two different models for the equation of state ("modes"), and four different "methods" how to evalute the equation of state are implemented.
Modes:
USES:
IMPLICIT NONE default: all is private. privatePUBLIC MEMBER FUNCTIONS:
public init_eqstate,eqstate1,eos_alpha,eos_beta,unesco,rho_feistelREVISION HISTORY:
Original author(s): Hans Burchard & Karsten Bolding